The functional unit of the liver is the: MCQ with Answer and Explanation

Explanation:
The midbrain (mesencephalon) is the uppermost part of the brainstem. Its dorsal surface features four rounded elevations called the corpora quadrigemina (meaning 'four bodies'). These consist of two upper, larger swellings called the superior colliculi, which are reflex centers for visual movements (like tracking moving objects), and two lower, smaller swellings called the inferior colliculi, which are part of the auditory pathway and relay sound information to the thalamus.

Explanation:
DNA replication is semiconservative, producing two identical copies from a template. Transcription makes RNA, translation makes protein.

Explanation:
Earthworms (annelids) have a closed circulatory system with blood contained within vessels. Cockroach, snail, and butterfly have open circulatory systems where hemolymph bathes organs directly.